diff env/lib/python3.7/site-packages/galaxy/util/filelock.py @ 5:9b1c78e6ba9c draft default tip

"planemo upload commit 6c0a8142489327ece472c84e558c47da711a9142"

--- a/env/lib/python3.7/site-packages/galaxy/util/filelock.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,82 +0,0 @@
-"""Code obtained from https://github.com/dmfrey/FileLock.
-
-See full license at:
-
-https://github.com/dmfrey/FileLock/blob/master/LICENSE.txt
-
-"""
-import errno
-import os
-import time
-
-
-class FileLockException(Exception):
-    pass
-
-
-class FileLock(object):
-    """ A file locking mechanism that has context-manager support so
-        you can use it in a with statement. This should be relatively cross
-        compatible as it doesn't rely on msvcrt or fcntl for the locking.
-    """
-
-    def __init__(self, file_name, timeout=10, delay=.05):
-        """ Prepare the file locker. Specify the file to lock and optionally
-            the maximum timeout and the delay between each attempt to lock.
-        """
-        self.is_locked = False
-        full_path = os.path.abspath(file_name)
-        self.lockfile = "%s.lock" % full_path
-        self.file_name = full_path
-        self.timeout = timeout
-        self.delay = delay
-
-    def acquire(self):
-        """ Acquire the lock, if possible. If the lock is in use, it check again
-            every `wait` seconds. It does this until it either gets the lock or
-            exceeds `timeout` number of seconds, in which case it throws
-            an exception.
-        """
-        start_time = time.time()
-        while True:
-            try:
-                self.fd = os.open(self.lockfile, os.O_CREAT | os.O_EXCL | os.O_RDWR)
-                break
-            except OSError as e:
-                if e.errno != errno.EEXIST:
-                    raise
-                if (time.time() - start_time) >= self.timeout:
-                    raise FileLockException("Timeout occurred.")
-                time.sleep(self.delay)
-        self.is_locked = True
-
-    def release(self):
-        """ Get rid of the lock by deleting the lockfile.
-            When working in a `with` statement, this gets automatically
-            called at the end.
-        """
-        if self.is_locked:
-            os.close(self.fd)
-            os.unlink(self.lockfile)
-            self.is_locked = False
-
-    def __enter__(self):
-        """ Activated when used in the with statement.
-            Should automatically acquire a lock to be used in the with block.
-        """
-        if not self.is_locked:
-            self.acquire()
-        return self
-
-    def __exit__(self, type, value, traceback):
-        """ Activated at the end of the with statement.
-            It automatically releases the lock if it isn't locked.
-        """
-        if self.is_locked:
-            self.release()
-
-    def __del__(self):
-        """ Make sure that the FileLock instance doesn't leave a lockfile
-            lying around.
-        """
-        self.release()